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GB 28736-2012 English PDF (GB28736-2012)

GB 28736-2012 English PDF (GB28736-2012)

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GB 28736-2012: Minimum allowable values of energy efficiency and energy efficiency grades for arc welding machines

This Standard specifies the energy efficiency grade, energy efficiency limit value, energy conservation evaluation value and test method of arc welding machines. This Standard applies to arc welding machines that are powered by the voltage specified in Table 1 of GB 156, and that are designed for industrial and professional use.
GB/T 28736-2012
GB
ICS 27.010
F 01
NATIONAL STANDARD
OF THE PEOPLE REPUBLIC OF CHINA
Minimum allowable values of energy efficiency
and energy efficiency grades for arc welding
machines
ISSUED ON. NOVEMBER 05, 2011
IMPLEMENTED ON. JUNE 01, 2013
Issued by. General Administration of Quality Supervision, Inspection
and Quarantine of the PEOPLE Republic of China;
Standardization Administration of the PEOPLE Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 4
4 Technical requirements ... 5
5 Test method ... 7
Foreword
Clause 4.3 of this Standard is mandatory; the rest are recommended.
This Standard is drafted according to the rules given in GB/T 1.1-2009. This Standard was proposed by Department of Resource Conservation and
Environmental Protection of National Development and Reform Commission. This Standard shall be under the jurisdiction of National Technical Committee on Energy Fundamentals and Management Standardization (SAC/TC 20).
Drafting organizations of this Standard. Panasonic Welding Systems (Tangshan) Co., Ltd., China National Institute of Standardization, Kaierda Group Co., Ltd., Chengdu Institute for Electrical Inspection, Zhejiang Kende Mechanical and Electrical Co., Ltd., Chengdu Xionggu Electrical Industrial Co., Ltd., Beijing Time Technologies Co., Ltd., Chengdu Southwest Welding Equipment Manufacture Co., Ltd., Shenzhen Riland Industry Co., Ltd., South China University of Technology, Guangzhou City Tongcheng Welding Equipment Technology Co., Ltd., China Quality Certification Center, Zhejiang Provincial Institute for Quality Inspection of Mechanical and Electrical Products, and Chengdu Sanfang Electrical Appliance Co., Ltd.
Main drafters of this Standard. Chen Jie, Zhao Yuejin, Chu Hua, Yin Xianhua , Pan Ying, Zhu Yihui, Xiao Jieguang, Bao YunJie, Chen Benlin, Qiu Guang, Huang Shisheng, Wang Zhenmin, Luo Yan, Zhang Zuowen, and Ruan Jianguo.
Minimum allowable values of energy efficiency and
energy efficiency grades for arc welding machines
1 Scope
This Standard specifies the energy efficiency grade, energy efficiency limit value, energy conservation evaluation value and test method of arc welding machines.
This Standard applies to arc welding machines that are powered by the voltage specified in Table 1 of GB/T 156, and that are designed for industrial and professional use. This Standard does not apply to AC TIG arc welding machines, AC and DC TIG arc welding machines, arc welding machines that are driven by mechanical equipment, and manual metal arc welding power source with restricted loads that are used by non-professionals.
2 Normative references
The following documents are indispensable for application of this document. For the dated documents so quoted, only dated versions apply to this document. For the undated documents so quoted, the latest versions (including all modification sheets) apply to this document.
GB/T 156 Standard voltage (IEC 60038)
GB/T 2900.22 Electrotechnical terminology - Electric welding machine
GB/T 8118 The general specification for arc welding machines
GB/T 15579.1 Safety requirements for arc welding equipment - Part 1. Welding power sources (IEC 60974-1)
3 Terms and definitions
Those defined in GB/T 2900.22 and GB 15579.1 AND following terms and definitions apply to this document.
3.1
Minimum allowable values of energy efficiency for arc welding machine
Under test conditions specified by the standard, the minimum guaranteed value of Table 5 Energy efficiency grades for DC submerged arc welding machine
Rated Current
Grade/A
Efficiency /% Power Factor in Load Conditions
Percentage of No-load
Current over Rated Input
Current/%
Grade 3 Grade 2 Grade 1 Grade 2 Grade 1 Grade 1
630~999 78.0 92.0 93.0 0.90 0.95 4.0
1 000~1 300 80.0 93.0 95.0 0.91 0.95 4.0
1 301~2 000 81.0 95.0 96.0 0.92 0.95 4.0
Table 6 Energy efficiency grades for plasma arc welding machine
Rated
Current
Grade/A
Efficiency /% Power Factor in Load Conditions
Percentage of No-load
Current over Rated Input
Current/%
Grade 3 Grade 2 Grade 1 Grade 2 Grade 1 Grade 1
30~62 78.5 85.0 90.0 0.82 0.90 3.0
63~99 72.5 86.5 90.0 0.85 0.91 3.0
100~159 74.0 88.5 92.0 0.88 0.92 3.0
160~199 82.0 90.0 93.0 0.90 0.92 2.5
200~500 85.0 92.0 95.0 0.90 0.95 2.5
5 Test method
Efficiency, power factor and no-load current of electric arc welding machine shall be determined according to the requirements prescribed in GB/T 8118.

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